Attachment for torch burning machines



Feb. 6, 1945'. c. R. BURTON 2,368,967

ATTACHMENT FOR TORCH BURNING MACHINES Filed May 19, 1945 InventorPatented Feb. 6, 1945 ATTACHLIENT FOR TORCH BURNING MACHINES Clyde RoyBurton, Brunswick, Maine Application May 19, 1943, Serial'No. 487,660

1 Claim.

The present invention relatesgenerally to new and useful improvements intorch burning machines such as that constituting the subject matter ofUnited States Patent No. 2,040,914, issued on May 19, 1936. v

The primary object of the invention is to provide, in a burning machineof the aforementioned.

character, novel means for, expeditiously andaccurately moving oradjusting themanual tracer inwardly or outwardly on the table whencutting concentric circles without interfering with the forward movementof said tracer.

Other objects of the invention are to provide a torch burning machineattachment of the character described which will be comparatively simplein construction, strong, durable, compact, and which may be manufacturedat low cost.

All of the foregoing and still further objects and advantages of theinvention willrbecome ap-- parent from a study of the followingspecification, taken in connection with the accompanying drawing whereinlike characters of reference desis slidable in the cylinder 1, saidplunger projecting through the forward end of said cylinder forengagement with the cam 4. Anadjustable plug 9 closes the other end ofthe cylinder 1. A

coil spring 10 in the cylinder 1 yieldingly urges the plunger 8 againstthe cam 4.

In use, the plunger 8, under the influence of the coil spring I0, isengageable with either of the flat faces of the cam 4 for yieldinglysecuring the device in either of its two positions:

With the center pin 3 engaged in the opening in the tracer table and theradius rod, which passes through the tracer wheel of the machine securedin the nut 6, the lever I is'swung through an arc 1 be readily donewithout interfering in any way with the forward movement of the tracerwheel. Further, the tracer wheel will be shifted inwardly and outwardlyto precisely the same position ignate corresponding parts throughout thesevj eral views, and wherein:

Figure 1 is a top plan view of an attachment constructed in accordancewith the'present invention.

Figure 2 is a view in side elevation of the device, showing a portionthereof in vertical section.

Figure 3 is a bottom plan view of the device.

Referring now to the drawing in detail, it will be seen that theembodiment of the invention which has been illustrated comprises a leverI. At one end' the lever l terminates in a flat enlargement or head 2.Fixed in the head 2 to one side of the longitudinal center of the leverI, is a pivot pin 3. The pivot pin 3 extends downwardly from the head 2and is engageable in the usual opening in the tracer table of themachine for mounting said lever on saidtable for swinging movement.

Swivelly mounted on top of the head 2 to the other side of thelongitudinal center of the lever l, is a cam or the like 4 comprisingflat faces 5. A nut 6 is fixed on top of the cam 4. The radius rod ofthe machine is to be secured in the nut 6.

Fixed longitudinally on the lever I adjacent the head 2, is acylinder 1. A headed plunger 8 each time.

It is believed that the advantages of an attachment constructed inaccordance with the present invention will be readily understood andalthough a preferred embodiment of the device is as illustrated anddescribed, it is to be understood that changes in the details ofconstruction may be resorted to which will fall within the scope of theinvention as claimed.

What is claimed is:

A tracer-adjusting attachment for a 'torchburning machine of a typeincluding a table having an opening therein and a tracer operable on thetable and having a radius rod for guiding the tracer, said attachmentcomprising a lever, a pivot pin on one end portion of the lever tooneside of the longitudinal center thereof and engageable in the opening ofthe table for mounting the lever on the table for swingingmovement, amember swivelly mounted on said one end portion of the lever on theother side of the longitudinal center thereof for connection with theradius rod of the tracer, and means for yieldingly securing the leveragainst rotary movement relative to said member.

CLYDE ROY BURTON.

The coni

